tests/dns_name_tests.rs - platform/external/rust/crates/webpki - Git at Google

 // Copyright 2014-2017 Brian Smith.

 // (name, is_valid)
 static DNS_NAME_VALIDITY: &[(&[u8], bool)] = &[
     (b"a", true),
     (b"a.b", true),
     (b"a.b.c", true),
     (b"a.b.c.d", true),

     // Hyphens, one component.
     (b"-", false),
     (b"-a", false),
     (b"a-", false),
     (b"a-b", true),

     // Hyphens, last component.
     (b"a.-", false),
     (b"a.-a", false),
     (b"a.a-", false),
     (b"a.a-b", true),

     // Hyphens, not last component.
     (b"-.a", false),
     (b"-a.a", false),
     (b"a-.a", false),
     (b"a-b.a", true),

     // Underscores, one component.
     (b"_", true), // TODO: Perhaps this should be rejected for '_' being sole character?.
     (b"_a", true), // TODO: Perhaps this should be rejected for '_' being 1st?
     (b"a_", true),
     (b"a_b", true),

     // Underscores, last component.
     (b"a._", true), // TODO: Perhaps this should be rejected for '_' being sole character?.
     (b"a._a", true), // TODO: Perhaps this should be rejected for '_' being 1st?
     (b"a.a_", true),
     (b"a.a_b", true),

     // Underscores, not last component.
     (b"_.a", true), // TODO: Perhaps this should be rejected for '_' being sole character?.
     (b"_a.a", true),
     (b"a_.a", true),
     (b"a_b.a", true),

     // empty labels
     (b"", false),
     (b".", false),
     (b"a", true),
     (b".a", false),
     (b".a.b", false),
     (b"..a", false),
     (b"a..b", false),
     (b"a...b", false),
     (b"a..b.c", false),
     (b"a.b..c", false),
     (b".a.b.c.", false),

     // absolute names
     (b"a.", true),
     (b"a.b.", true),
     (b"a.b.c.", true),

     // absolute names with empty label at end
     (b"a..", false),
     (b"a.b..", false),
     (b"a.b.c..", false),
     (b"a...", false),

     // Punycode
     (b"xn--", false),
     (b"xn--.", false),
     (b"xn--.a", false),
     (b"a.xn--", false),
     (b"a.xn--.", false),
     (b"a.xn--.b", false),
     (b"a.xn--.b", false),
     (b"a.xn--\0.b", false),
     (b"a.xn--a.b", true),
     (b"xn--a", true),
     (b"a.xn--a", true),
     (b"a.xn--a.a", true),
     (b"\xc4\x95.com", false), // UTF-8 ĕ
     (b"xn--jea.com", true), // punycode ĕ
     (b"xn--\xc4\x95.com", false), // UTF-8 ĕ, malformed punycode + UTF-8 mashup

     // Surprising punycode
     (b"xn--google.com", true), // 䕮䕵䕶䕱.com
     (b"xn--citibank.com", true), // 岍岊岊岅岉岎.com
     (b"xn--cnn.com", true), // 䁾.com
     (b"a.xn--cnn", true), // a.䁾
     (b"a.xn--cnn.com", true), // a.䁾.com

     (b"1.2.3.4", false), // IPv4 address
     (b"1::2", false), // IPV6 address

     // whitespace not allowed anywhere.
     (b" ", false),
     (b" a", false),
     (b"a ", false),
     (b"a b", false),
     (b"a.b 1", false),
     (b"a\t", false),

     // Nulls not allowed
     (b"\0", false),
     (b"a\0", false),
     (b"example.org\0.example.com", false), // Hi Moxie!
     (b"\0a", false),
     (b"xn--\0", false),

     // Allowed character set
     (b"a.b.c.d.e.f.g.h.i.j.k.l.m.n.o.p.q.r.s.t.u.v.w.x.y.z", true),
     (b"A.B.C.D.E.F.G.H.I.J.K.L.M.N.O.P.Q.R.S.T.U.V.W.X.Y.Z", true),
     (b"0.1.2.3.4.5.6.7.8.9.a", true), // "a" needed to avoid numeric last label
     (b"a-b", true), // hyphen (a label cannot start or end with a hyphen)

     // An invalid character in various positions
     (b"!", false),
     (b"!a", false),
     (b"a!", false),
     (b"a!b", false),
     (b"a.!", false),
     (b"a.a!", false),
     (b"a.!a", false),
     (b"a.a!a", false),
     (b"a.!a.a", false),
     (b"a.a!.a", false),
     (b"a.a!a.a", false),

     // Various other invalid characters
     (b"a!", false),
     (b"a@", false),
     (b"a#", false),
     (b"a$", false),
     (b"a%", false),
     (b"a^", false),
     (b"a&", false),
     (b"a*", false),
     (b"a(", false),
     (b"a)", false),

     // last label can't be fully numeric
     (b"1", false),
     (b"a.1", false),

     // other labels can be fully numeric
     (b"1.a", true),
     (b"1.2.a", true),
     (b"1.2.3.a", true),

     // last label can be *partly* numeric
     (b"1a", true),
     (b"1.1a", true),
     (b"1-1", true),
     (b"a.1-1", true),
     (b"a.1-a", true),

     // labels cannot start with a hyphen
     (b"-", false),
     (b"-1", false),

     // labels cannot end with a hyphen
     (b"1-", false),
     (b"1-.a", false),
     (b"a-", false),
     (b"a-.a", false),
     (b"a.1-.a", false),
     (b"a.a-.a", false),

     // labels can contain a hyphen in the middle
     (b"a-b", true),
     (b"1-2", true),
     (b"a.a-1", true),

     // multiple consecutive hyphens allowed
     (b"a--1", true),
     (b"1---a", true),
     (b"a-----------------b", true),

     // Wildcard specifications are not valid reference names.
     (b"*.a", false),
     (b"a*", false),
     (b"a*.", false),
     (b"a*.a", false),
     (b"a*.a.", false),
     (b"*.a.b", false),
     (b"*.a.b.", false),
     (b"a*.b.c", false),
     (b"*.a.b.c", false),
     (b"a*.b.c.d", false),

     // Multiple wildcards.
     (b"a**.b.c", false),
     (b"a*b*.c.d", false),
     (b"a*.b*.c", false),

     // Wildcards not in the first label.
     (b"a.*", false),
     (b"a.*.b", false),
     (b"a.b.*", false),
     (b"a.b*.c", false),
     (b"*.b*.c", false),
     (b".*.a.b", false),
     (b".a*.b.c", false),

     // Wildcards not at the end of the first label.
     (b"*a.b.c", false),
     (b"a*b.c.d", false),

     // Wildcards and IDNA prefix.
     (b"x*.a.b", false),
     (b"xn*.a.b", false),
     (b"xn-*.a.b", false),
     (b"xn--*.a.b", false),
     (b"xn--w*.a.b", false),

     // Redacted labels from RFC6962bis draft 4
     // https://tools.ietf.org/html/draft-ietf-trans-rfc6962-bis-04#section-3.2.2
     (b"(PRIVATE).foo", false),

     // maximum label length is 63 characters
     (b"123456789012345678901234567890123456789012345678901234567890abc", true),
     (b"123456789012345678901234567890123456789012345678901234567890abcd", false),

     // maximum total length is 253 characters
     (b"12345678901234567890123456789012345678901234567890.12345678901234567890123456789012345678901234567890.12345678901234567890123456789012345678901234567890.12345678901234567890123456789012345678901234567890.123456789012345678901234567890123456789012345678a",
      true),
     (b"12345678901234567890123456789012345678901234567890.12345678901234567890123456789012345678901234567890.12345678901234567890123456789012345678901234567890.12345678901234567890123456789012345678901234567890.1234567890123456789012345678901234567890123456789a",
      false),
 ];

 // (IP address, is valid DNS name). The comments here refer to the validity of
 // the string as an IP address, not as a DNS name validity.
 static IP_ADDRESS_DNS_VALIDITY: &[(&[u8], bool)] = &[
     (b"", false),
     (b"1", false),
     (b"1.2", false),
     (b"1.2.3", false),
     (b"1.2.3.4", false),
     (b"1.2.3.4.5", false),
     (b"1.2.3.4a", true), // a DNS name!
     (b"a.2.3.4", false), // not even a DNS name!
     (b"1::2", false),    // IPv6 address
     // Whitespace not allowed
     (b" 1.2.3.4", false),
     (b"1.2.3.4 ", false),
     (b"1 .2.3.4", false),
     (b"\n1.2.3.4", false),
     (b"1.2.3.4\n", false),
     // Nulls not allowed
     (b"\0", false),
     (b"\01.2.3.4", false),
     (b"1.2.3.4\0", false),
     (b"1.2.3.4\0.5", false),
     // Range
     (b"0.0.0.0", false),
     (b"255.255.255.255", false),
     (b"256.0.0.0", false),
     (b"0.256.0.0", false),
     (b"0.0.256.0", false),
     (b"0.0.0.256", false),
     (b"999.0.0.0", false),
     (b"9999999999999999999.0.0.0", false),
     // All digits allowed
     (b"0.1.2.3", false),
     (b"4.5.6.7", false),
     (b"8.9.0.1", false),
     // Leading zeros not allowed
     (b"01.2.3.4", false),
     (b"001.2.3.4", false),
     (b"00000000001.2.3.4", false),
     (b"010.2.3.4", false),
     (b"1.02.3.4", false),
     (b"1.2.03.4", false),
     (b"1.2.3.04", false),
     // Empty components
     (b".2.3.4", false),
     (b"1..3.4", false),
     (b"1.2..4", false),
     (b"1.2.3.", false),
     // Too many components
     (b"1.2.3.4.5", false),
     (b"1.2.3.4.5.6", false),
     (b"0.1.2.3.4", false),
     (b"1.2.3.4.0", false),
     // Leading/trailing dot
     (b".1.2.3.4", false),
     (b"1.2.3.4.", false),
     // Other common forms of IPv4 address
     // http://en.wikipedia.org/wiki/IPv4#Address_representations
     (b"192.0.2.235", false),         // dotted decimal (control value)
     (b"0xC0.0x00.0x02.0xEB", true),  // dotted hex - actually a DNS name!
     (b"0301.0000.0002.0353", false), // dotted octal
     (b"0xC00002EB", true),           // non-dotted hex, actually a DNS name!
     (b"3221226219", false),          // non-dotted decimal
     (b"030000001353", false),        // non-dotted octal
     (b"192.0.0002.0xEB", true),      // mixed, actually a DNS name!
     (b"1234", false),
     (b"1234:5678", false),
     (b"1234:5678:9abc", false),
     (b"1234:5678:9abc:def0", false),
     (b"1234:5678:9abc:def0:1234:", false),
     (b"1234:5678:9abc:def0:1234:5678:", false),
     (b"1234:5678:9abc:def0:1234:5678:9abc:", false),
     (b"1234:5678:9abc:def0:1234:5678:9abc:def0", false),
     (b"1234:5678:9abc:def0:1234:5678:9abc:def0:", false),
     (b":1234:5678:9abc:def0:1234:5678:9abc:def0", false),
     (b"1234:5678:9abc:def0:1234:5678:9abc:def0:0000", false),
     // Valid contractions
     (b"::1", false),
     (b"::1234", false),
     (b"1234::", false),
     (b"1234::5678", false),
     (b"1234:5678::abcd", false),
     (b"1234:5678:9abc:def0:1234:5678:9abc::", false),
     // Contraction in full IPv6 addresses not allowed
     (b"::1234:5678:9abc:def0:1234:5678:9abc:def0", false), // start
     (b"1234:5678:9abc:def0:1234:5678:9abc:def0::", false), // end
     (b"1234:5678::9abc:def0:1234:5678:9abc:def0", false),  // interior
     // Multiple contractions not allowed
     (b"::1::", false),
     (b"::1::2", false),
     (b"1::2::", false),
     // Colon madness!
     (b":", false),
     (b"::", false),
     (b":::", false),
     (b"::::", false),
     (b":::1", false),
     (b"::::1", false),
     (b"1:::2", false),
     (b"1::::2", false),
     (b"1:2:::", false),
     (b"1:2::::", false),
     (b"::1234:", false),
     (b":1234::", false),
     (b"01234::", false),    // too many digits, even if zero
     (b"12345678::", false), // too many digits or missing colon
     // uppercase
     (b"ABCD:EFAB::", false),
     // miXeD CAse
     (b"aBcd:eFAb::", false),
     // IPv4-style
     (b"::2.3.4.5", false),
     (b"1234::2.3.4.5", false),
     (b"::abcd:2.3.4.5", false),
     (b"1234:5678:9abc:def0:1234:5678:252.253.254.255", false),
     (b"1234:5678:9abc:def0:1234::252.253.254.255", false),
     (b"1234::252.253.254", false),
     (b"::252.253.254", false),
     (b"::252.253.254.300", false),
     (b"1234::252.253.254.255:", false),
     (b"1234::252.253.254.255:5678", false),
     // Contractions that don't contract
     (b"::1234:5678:9abc:def0:1234:5678:9abc:def0", false),
     (b"1234:5678:9abc:def0:1234:5678:9abc:def0::", false),
     (b"1234:5678:9abc:def0::1234:5678:9abc:def0", false),
     (b"1234:5678:9abc:def0:1234:5678::252.253.254.255", false),
     // With and without leading zeros
     (b"::123", false),
     (b"::0123", false),
     (b"::012", false),
     (b"::0012", false),
     (b"::01", false),
     (b"::001", false),
     (b"::0001", false),
     (b"::0", false),
     (b"::00", false),
     (b"::000", false),
     (b"::0000", false),
     (b"::01234", false),
     (b"::00123", false),
     (b"::000123", false),
     // Trailing zero
     (b"::12340", false),
     // Whitespace
     (b" 1234:5678:9abc:def0:1234:5678:9abc:def0", false),
     (b"\t1234:5678:9abc:def0:1234:5678:9abc:def0", false),
     (b"\t1234:5678:9abc:def0:1234:5678:9abc:def0\n", false),
     (b"1234 :5678:9abc:def0:1234:5678:9abc:def0", false),
     (b"1234: 5678:9abc:def0:1234:5678:9abc:def0", false),
     (b":: 2.3.4.5", false),
     (b"1234::252.253.254.255 ", false),
     (b"1234::252.253.254.255\n", false),
     (b"1234::252.253. 254.255", false),
     // Nulls
     (b"\0", false),
     (b"::1\0:2", false),
     (b"::1\0", false),
     (b"::1.2.3.4\0", false),
     (b"::1.2\02.3.4", false),
 ];

 #[test]
 fn dns_name_ref_try_from_ascii_test() {
     for &(s, is_valid) in DNS_NAME_VALIDITY
         .iter()
         .chain(IP_ADDRESS_DNS_VALIDITY.iter())
     {
         assert_eq!(
             webpki::DnsNameRef::try_from_ascii(s).is_ok(),
             is_valid,
             "DnsNameRef::try_from_ascii_str failed for \"{:?}\"",
             s
         );
     }
 }
	// Copyright 2014-2017 Brian Smith.

	// (name, is_valid)
	static DNS_NAME_VALIDITY: &[(&[u8], bool)] = &[
	(b"a", true),
	(b"a.b", true),
	(b"a.b.c", true),
	(b"a.b.c.d", true),

	// Hyphens, one component.
	(b"-", false),
	(b"-a", false),
	(b"a-", false),
	(b"a-b", true),

	// Hyphens, last component.
	(b"a.-", false),
	(b"a.-a", false),
	(b"a.a-", false),
	(b"a.a-b", true),

	// Hyphens, not last component.
	(b"-.a", false),
	(b"-a.a", false),
	(b"a-.a", false),
	(b"a-b.a", true),

	// Underscores, one component.
	(b"_", true), // TODO: Perhaps this should be rejected for '_' being sole character?.
	(b"_a", true), // TODO: Perhaps this should be rejected for '_' being 1st?
	(b"a_", true),
	(b"a_b", true),

	// Underscores, last component.
	(b"a._", true), // TODO: Perhaps this should be rejected for '_' being sole character?.
	(b"a._a", true), // TODO: Perhaps this should be rejected for '_' being 1st?
	(b"a.a_", true),
	(b"a.a_b", true),

	// Underscores, not last component.
	(b"_.a", true), // TODO: Perhaps this should be rejected for '_' being sole character?.
	(b"_a.a", true),
	(b"a_.a", true),
	(b"a_b.a", true),

	// empty labels
	(b"", false),
	(b".", false),
	(b"a", true),
	(b".a", false),
	(b".a.b", false),
	(b"..a", false),
	(b"a..b", false),
	(b"a...b", false),
	(b"a..b.c", false),
	(b"a.b..c", false),
	(b".a.b.c.", false),

	// absolute names
	(b"a.", true),
	(b"a.b.", true),
	(b"a.b.c.", true),

	// absolute names with empty label at end
	(b"a..", false),
	(b"a.b..", false),
	(b"a.b.c..", false),
	(b"a...", false),

	// Punycode
	(b"xn--", false),
	(b"xn--.", false),
	(b"xn--.a", false),
	(b"a.xn--", false),
	(b"a.xn--.", false),
	(b"a.xn--.b", false),
	(b"a.xn--.b", false),
	(b"a.xn--\0.b", false),
	(b"a.xn--a.b", true),
	(b"xn--a", true),
	(b"a.xn--a", true),
	(b"a.xn--a.a", true),
	(b"\xc4\x95.com", false), // UTF-8 ĕ
	(b"xn--jea.com", true), // punycode ĕ
	(b"xn--\xc4\x95.com", false), // UTF-8 ĕ, malformed punycode + UTF-8 mashup

	// Surprising punycode
	(b"xn--google.com", true), // 䕮䕵䕶䕱.com
	(b"xn--citibank.com", true), // 岍岊岊岅岉岎.com
	(b"xn--cnn.com", true), // 䁾.com
	(b"a.xn--cnn", true), // a.䁾
	(b"a.xn--cnn.com", true), // a.䁾.com

	(b"1.2.3.4", false), // IPv4 address
	(b"1::2", false), // IPV6 address

	// whitespace not allowed anywhere.
	(b" ", false),
	(b" a", false),
	(b"a ", false),
	(b"a b", false),
	(b"a.b 1", false),
	(b"a\t", false),

	// Nulls not allowed
	(b"\0", false),
	(b"a\0", false),
	(b"example.org\0.example.com", false), // Hi Moxie!
	(b"\0a", false),
	(b"xn--\0", false),

	// Allowed character set
	(b"a.b.c.d.e.f.g.h.i.j.k.l.m.n.o.p.q.r.s.t.u.v.w.x.y.z", true),
	(b"A.B.C.D.E.F.G.H.I.J.K.L.M.N.O.P.Q.R.S.T.U.V.W.X.Y.Z", true),
	(b"0.1.2.3.4.5.6.7.8.9.a", true), // "a" needed to avoid numeric last label
	(b"a-b", true), // hyphen (a label cannot start or end with a hyphen)

	// An invalid character in various positions
	(b"!", false),
	(b"!a", false),
	(b"a!", false),
	(b"a!b", false),
	(b"a.!", false),
	(b"a.a!", false),
	(b"a.!a", false),
	(b"a.a!a", false),
	(b"a.!a.a", false),
	(b"a.a!.a", false),
	(b"a.a!a.a", false),

	// Various other invalid characters
	(b"a!", false),
	(b"a@", false),
	(b"a#", false),
	(b"a$", false),
	(b"a%", false),
	(b"a^", false),
	(b"a&", false),
	(b"a*", false),
	(b"a(", false),
	(b"a)", false),

	// last label can't be fully numeric
	(b"1", false),
	(b"a.1", false),

	// other labels can be fully numeric
	(b"1.a", true),
	(b"1.2.a", true),
	(b"1.2.3.a", true),

	// last label can be partly numeric
	(b"1a", true),
	(b"1.1a", true),
	(b"1-1", true),
	(b"a.1-1", true),
	(b"a.1-a", true),

	// labels cannot start with a hyphen
	(b"-", false),
	(b"-1", false),

	// labels cannot end with a hyphen
	(b"1-", false),
	(b"1-.a", false),
	(b"a-", false),
	(b"a-.a", false),
	(b"a.1-.a", false),
	(b"a.a-.a", false),

	// labels can contain a hyphen in the middle
	(b"a-b", true),
	(b"1-2", true),
	(b"a.a-1", true),

	// multiple consecutive hyphens allowed
	(b"a--1", true),
	(b"1---a", true),
	(b"a-----------------b", true),

	// Wildcard specifications are not valid reference names.
	(b"*.a", false),
	(b"a*", false),
	(b"a*.", false),
	(b"a*.a", false),
	(b"a*.a.", false),
	(b"*.a.b", false),
	(b"*.a.b.", false),
	(b"a*.b.c", false),
	(b"*.a.b.c", false),
	(b"a*.b.c.d", false),

	// Multiple wildcards.
	(b"a**.b.c", false),
	(b"ab.c.d", false),
	(b"a.b.c", false),

	// Wildcards not in the first label.
	(b"a.*", false),
	(b"a.*.b", false),
	(b"a.b.*", false),
	(b"a.b*.c", false),
	(b".b.c", false),
	(b".*.a.b", false),
	(b".a*.b.c", false),

	// Wildcards not at the end of the first label.
	(b"*a.b.c", false),
	(b"a*b.c.d", false),

	// Wildcards and IDNA prefix.
	(b"x*.a.b", false),
	(b"xn*.a.b", false),
	(b"xn-*.a.b", false),
	(b"xn--*.a.b", false),
	(b"xn--w*.a.b", false),

	// Redacted labels from RFC6962bis draft 4
	// https://tools.ietf.org/html/draft-ietf-trans-rfc6962-bis-04#section-3.2.2
	(b"(PRIVATE).foo", false),

	// maximum label length is 63 characters
	(b"123456789012345678901234567890123456789012345678901234567890abc", true),
	(b"123456789012345678901234567890123456789012345678901234567890abcd", false),

	// maximum total length is 253 characters
	(b"12345678901234567890123456789012345678901234567890.12345678901234567890123456789012345678901234567890.12345678901234567890123456789012345678901234567890.12345678901234567890123456789012345678901234567890.123456789012345678901234567890123456789012345678a",
	true),
	(b"12345678901234567890123456789012345678901234567890.12345678901234567890123456789012345678901234567890.12345678901234567890123456789012345678901234567890.12345678901234567890123456789012345678901234567890.1234567890123456789012345678901234567890123456789a",
	false),
	];

	// (IP address, is valid DNS name). The comments here refer to the validity of
	// the string as an IP address, not as a DNS name validity.
	static IP_ADDRESS_DNS_VALIDITY: &[(&[u8], bool)] = &[
	(b"", false),
	(b"1", false),
	(b"1.2", false),
	(b"1.2.3", false),
	(b"1.2.3.4", false),
	(b"1.2.3.4.5", false),
	(b"1.2.3.4a", true), // a DNS name!
	(b"a.2.3.4", false), // not even a DNS name!
	(b"1::2", false), // IPv6 address
	// Whitespace not allowed
	(b" 1.2.3.4", false),
	(b"1.2.3.4 ", false),
	(b"1 .2.3.4", false),
	(b"\n1.2.3.4", false),
	(b"1.2.3.4\n", false),
	// Nulls not allowed
	(b"\0", false),
	(b"\01.2.3.4", false),
	(b"1.2.3.4\0", false),
	(b"1.2.3.4\0.5", false),
	// Range
	(b"0.0.0.0", false),
	(b"255.255.255.255", false),
	(b"256.0.0.0", false),
	(b"0.256.0.0", false),
	(b"0.0.256.0", false),
	(b"0.0.0.256", false),
	(b"999.0.0.0", false),
	(b"9999999999999999999.0.0.0", false),
	// All digits allowed
	(b"0.1.2.3", false),
	(b"4.5.6.7", false),
	(b"8.9.0.1", false),
	// Leading zeros not allowed
	(b"01.2.3.4", false),
	(b"001.2.3.4", false),
	(b"00000000001.2.3.4", false),
	(b"010.2.3.4", false),
	(b"1.02.3.4", false),
	(b"1.2.03.4", false),
	(b"1.2.3.04", false),
	// Empty components
	(b".2.3.4", false),
	(b"1..3.4", false),
	(b"1.2..4", false),
	(b"1.2.3.", false),
	// Too many components
	(b"1.2.3.4.5", false),
	(b"1.2.3.4.5.6", false),
	(b"0.1.2.3.4", false),
	(b"1.2.3.4.0", false),
	// Leading/trailing dot
	(b".1.2.3.4", false),
	(b"1.2.3.4.", false),
	// Other common forms of IPv4 address
	// http://en.wikipedia.org/wiki/IPv4#Address_representations
	(b"192.0.2.235", false), // dotted decimal (control value)
	(b"0xC0.0x00.0x02.0xEB", true), // dotted hex - actually a DNS name!
	(b"0301.0000.0002.0353", false), // dotted octal
	(b"0xC00002EB", true), // non-dotted hex, actually a DNS name!
	(b"3221226219", false), // non-dotted decimal
	(b"030000001353", false), // non-dotted octal
	(b"192.0.0002.0xEB", true), // mixed, actually a DNS name!
	(b"1234", false),
	(b"1234:5678", false),
	(b"1234:5678:9abc", false),
	(b"1234:5678:9abc:def0", false),
	(b"1234:5678:9abc:def0:1234:", false),
	(b"1234:5678:9abc:def0:1234:5678:", false),
	(b"1234:5678:9abc:def0:1234:5678:9abc:", false),
	(b"1234:5678:9abc:def0:1234:5678:9abc:def0", false),
	(b"1234:5678:9abc:def0:1234:5678:9abc:def0:", false),
	(b":1234:5678:9abc:def0:1234:5678:9abc:def0", false),
	(b"1234:5678:9abc:def0:1234:5678:9abc:def0:0000", false),
	// Valid contractions
	(b"::1", false),
	(b"::1234", false),
	(b"1234::", false),
	(b"1234::5678", false),
	(b"1234:5678::abcd", false),
	(b"1234:5678:9abc:def0:1234:5678:9abc::", false),
	// Contraction in full IPv6 addresses not allowed
	(b"::1234:5678:9abc:def0:1234:5678:9abc:def0", false), // start
	(b"1234:5678:9abc:def0:1234:5678:9abc:def0::", false), // end
	(b"1234:5678::9abc:def0:1234:5678:9abc:def0", false), // interior
	// Multiple contractions not allowed
	(b"::1::", false),
	(b"::1::2", false),
	(b"1::2::", false),
	// Colon madness!
	(b":", false),
	(b"::", false),
	(b":::", false),
	(b"::::", false),
	(b":::1", false),
	(b"::::1", false),
	(b"1:::2", false),
	(b"1::::2", false),
	(b"1:2:::", false),
	(b"1:2::::", false),
	(b"::1234:", false),
	(b":1234::", false),
	(b"01234::", false), // too many digits, even if zero
	(b"12345678::", false), // too many digits or missing colon
	// uppercase
	(b"ABCD:EFAB::", false),
	// miXeD CAse
	(b"aBcd:eFAb::", false),
	// IPv4-style
	(b"::2.3.4.5", false),
	(b"1234::2.3.4.5", false),
	(b"::abcd:2.3.4.5", false),
	(b"1234:5678:9abc:def0:1234:5678:252.253.254.255", false),
	(b"1234:5678:9abc:def0:1234::252.253.254.255", false),
	(b"1234::252.253.254", false),
	(b"::252.253.254", false),
	(b"::252.253.254.300", false),
	(b"1234::252.253.254.255:", false),
	(b"1234::252.253.254.255:5678", false),
	// Contractions that don't contract
	(b"::1234:5678:9abc:def0:1234:5678:9abc:def0", false),
	(b"1234:5678:9abc:def0:1234:5678:9abc:def0::", false),
	(b"1234:5678:9abc:def0::1234:5678:9abc:def0", false),
	(b"1234:5678:9abc:def0:1234:5678::252.253.254.255", false),
	// With and without leading zeros
	(b"::123", false),
	(b"::0123", false),
	(b"::012", false),
	(b"::0012", false),
	(b"::01", false),
	(b"::001", false),
	(b"::0001", false),
	(b"::0", false),
	(b"::00", false),
	(b"::000", false),
	(b"::0000", false),
	(b"::01234", false),
	(b"::00123", false),
	(b"::000123", false),
	// Trailing zero
	(b"::12340", false),
	// Whitespace
	(b" 1234:5678:9abc:def0:1234:5678:9abc:def0", false),
	(b"\t1234:5678:9abc:def0:1234:5678:9abc:def0", false),
	(b"\t1234:5678:9abc:def0:1234:5678:9abc:def0\n", false),
	(b"1234 :5678:9abc:def0:1234:5678:9abc:def0", false),
	(b"1234: 5678:9abc:def0:1234:5678:9abc:def0", false),
	(b":: 2.3.4.5", false),
	(b"1234::252.253.254.255 ", false),
	(b"1234::252.253.254.255\n", false),
	(b"1234::252.253. 254.255", false),
	// Nulls
	(b"\0", false),
	(b"::1\0:2", false),
	(b"::1\0", false),
	(b"::1.2.3.4\0", false),
	(b"::1.2\02.3.4", false),
	];

	#[test]
	fn dns_name_ref_try_from_ascii_test() {
	for &(s, is_valid) in DNS_NAME_VALIDITY
	.iter()
	.chain(IP_ADDRESS_DNS_VALIDITY.iter())
	{
	assert_eq!(
	webpki::DnsNameRef::try_from_ascii(s).is_ok(),
	is_valid,
	"DnsNameRef::try_from_ascii_str failed for \"{:?}\"",
	s
	);
	}
	}